Technical Excellence

At TSL we strive for technical excellence and pride ourselves on a meticulous approach through all stages, ranging all the way through from design & procurement stages through to the after care management plan that is bespoke for every project.

Our design and management teams are highly experienced in all aspects of façade design this makes us proud to offer an in-house design service for the roofing & cladding systems we deliver. We work closely with major UK and European system manufacturers to provide our clients with a one-stop shop for bespoke façade projects by managing and coordinating all design interfaces.

We are big believers in doing things once and once only, to ensure this is the case our design & procurement processes need to be rigorous to ensure on-site perfection is met. Something the design team has been heavily investing in over the more recent years and is becoming an instrumental part of the project process.


The National Federation of Roofing Contractors Limited (NFRC) is the UK’s largest roofing trade association, representing over 70% of the roofing industry. With a history spanning almost 120 years, NFRC has established itself as one of the leading voices in the roofing industry.

Safe Contractor

SAFE contractor is programme which recognizes very high standards of health & safety practice amongst UK contractors.


Local authority health and safety and contract professionals, supported by the Health and Safety Executive, have developed the Contractor Health and Safety (CHAS) Assessment Scheme over recent years.

Competent Roofer

Is a Government-licenced Competent Person Scheme, allows roofing contractors to Self-Certify their own roof refurbishment work as compliant with Building Regulations in England & Wales


Sets industry standards and publishes both standards and guidance’s for key areas of construction and being a member of this allows us full access to all the latest training, technical updates and consultancy utilising their expertise in the window & cladding.

Construction Line

Constructionline is the UK’s most connected and progressive provider of procurement and supply chain management services, making contracting simpler and helping our customers achieve more.


JOSCAR is an accreditation system for the aerospace, defence and security sectors.

ISO 9001

ISO 9001:2015 sets out the criteria for a quality management system and is the only standard in the family that can be certified to. This standard is based on a number of quality management principles including a strong customer focus, the motivation and implication of top management, the process approach and continual improvement.


Originally founded in 1979, LRWA aims to raise awareness of the technical and financial benefits of specifying liquid-applied roofing & waterproofing systems and to establish product and installation standards to ensure that optimum performance is achieved.